Home > Barrels >

CMMG 8" 300 Blackout Barrel (300 BLACKOUT)
CMMG 8" 300 Blackout Barrel

MSRP $179.95
SALE PRICE: $139.99
Savings: $39.96

Stock Status :IN STOCK
Product Code: 30D810A


CMMG 8" 300 blackout Barrel 4140CM SBN (300 BLACKOUT)

  • Length: 8", 1:7" Twist
  • Chamber: 300 BLK
  • Profile: Medium Contour Profile
  • Material and Finish: 4140 CrMo, Salt Bath Nitride Finish (Melonite)
  • Muzzle Thread: 5/8"-24 TPI
  • Gas Port Location: Pistol
  • .750 Gas Block Journal

All NFA/ATF Rules Apply

Depending on your state and local laws, you could use this barrel with a lower receiver that is a Registered SBR, or Pistol. Possession of this barrel along with a Non-NFA lower receiver may be Prohibited. We are not lawyers and the above information is not legal advise. Make sure you understand the most up to date federal, state and local laws before proceeding with this product.

Average Rating: 5 of 5 Total Reviews: 16 Write a review »

  0 of 0 people found the following review helpful:
Pistol Build March 22, 2018
Reviewer: Raymond Hardin from Knoxville, TN United States  
Couldn't be happier!

Was this review helpful to you?

  1 of 1 people found the following review helpful:
Perfect! April 26, 2017
Reviewer: Mike from Hosuton, TX United States  
This is exactly what I was looking for to complete my AR pistol build.  I was hesitant about going any shorter than 9", as it will be paired with a suppressor, and I was concerned about excessive fouling from residue and powder not burning completely in such a short barrel. However, the new Hornady Black is supposed to address that issue with their quick burning powders.
Great finish, easy installation, just right!

Was this review helpful to you?

  0 of 0 people found the following review helpful:
Great barrel and Superb shipping April 5, 2017
Reviewer: Jim Gossett from Valley, AL United States  
I ordered on Monday,  received it on Wednesday.
Sorry, but it looks like I got the last one.
All parts are top quality and shipped in very secure packaging. The gas block went on easily due to the barrel already being dimpled and the QPQ gas tube included the pin.
 So 15 minutes later and I'm already making brass. Accuracy looks great with MBUS open sights in the back yard. Will mount optics and hit the range this weekend.
 It's great finding a dealer in Florida instead of the Left Coast.
 Thanks Right to Bear Arms and Supply.
 I'll be back soon and highly recommend you to my friends.
 I just wish you had included some decals for my range gear and truck window
 I'm only using this cheap gas block until you email me the Superlative Arms adjustable block is back in stock.

Was this review helpful to you?

  0 of 0 people found the following review helpful:
Cmmg 8 barrel February 22, 2017
Reviewer: Ryan Leblanc from Labadieville, LA United States  
Great product,Great shipping, Great people

Was this review helpful to you?

  0 of 0 people found the following review helpful:
cmmg 300 blkout barrel April 27, 2016
Reviewer: Anonymous Person from evanston , WY United States  
This is the third 8" cmmg barrel I have installed and I have been very pleased with the product and service provided.

Was this review helpful to you?

View All Customer Reviews